Opinion by

Henry Sproul & Company, stock brokers, who were engaged in business in the City of Pittsburgh, purchased for John Sloan, the appellee, in May, June and August, 1907, fifteen hundred shares of the capital stock of the United Copper Company. This stock was purchased at prices varying from $61.50 to $54 per share, and the brokers agreed to carry it for appellee on a margin of $20 per share, which he deposited with them. As this stock was purchased from time to time the brokers mingled it with other securities under their control,, and pledged them to a trust company and bankers as collateral for indebtedness of their own amounting to more than a million and a half dollars. This was without the authority or knowledge of Sloan. In April, 1908, Sproul & Company sold, at $6.25 per share, the stock which they had purchased for the appellee, but which he refused to pay for and take off their hands; and, after crediting him with the proceeds, the margins deposited and the dividends received on the stock, this suit was brought to recover the balance alleged to be due, amounting to $34,214.51, with interest from the date of the sale of the stock. A verdict was directed for the defendant, for the reason, as stated in the opinion of the court denying a new trial and judgment for the *287plaintiffs n. o. v., that, as Spronl & Company had converted to their own nse the stock purchased for the appellee, by hypothecating it for their own indebtedness, they had broken their contract with him and were in no , position to demand performance by him. As an authority for so holding, the learned trial judge cited and relied upon Gillett v. Whiting, 120 N. Y. 402. What was there said sustained him, though it was overlooked that subsequently the court of appeals held that the remarks in that case, as to the effect of a broker’s conversion of his customer’s securities upon his claim against the latter, were upon a question which was not before the court and were, therefore, to be regarded as mere obiter dicta, in conflict with the settled law of the state: Minor v. Beveridge, 141 N. Y. 399. It is not necessary for us to review the New York cases cited by counsel for appellant in support of their contention that the plaintiff below ought to have recovered, for we are of opinion that the view entertained by the court below was the correct one, without regard to the particular authority upon which it seems to have relied.

When Sproul & Company purchased the fifteen hundred shares of stock the legal title to it vested in Sloan, subject to the payment of the balance due by him for commissions and advances made by them. He became the pledgor and they the pledgees of the stock: Learock v. Paxson, 208 Pa. 602; Barbour v. Sproul, 239 Pa. 171. Sproul & Company might have used the stock in making a specific loan for the purpose of enabling them to carry the stock for the appellee, but, when they used it for any other purpose, they made an improper use of it, and when they pledged it, with other securities under their control, for their own indebtedness, they unlawfully converted it to their own use: Douglass v. Carpenter, 17 N. Y. App. Div. 329; Strickland v. Magoun, 119 N. Y. App. Div. 113, and 190 N. Y. 545; German Savings Bank v. Renshaw, 78 Md. 475. “One to whom stock has been pledged for a loan has full power *288to hypothecate it so long as the original pledgor may obtain possession of it upon payment of his debt; but if it has been mingled with the other securities of the pledgee, or has been rehypothecated by him to secure a different or larger debt than that for which it was pledged to him, or if the collaterals have been transferred, but the obligation they wére given to secure retained, or if it has been in any way placed beyond the control of the pledgee, this is a conversion”: Yide authorities cited in support of this in 31 Cyc. 837.

But it is earnestly contended by learned counsel for the appellant that inasmuch as Sloan suffered no damage by the brokers’ conversion of his stock, he ought not to be permitted to defeat their claim. This begs the question, for the moment the stock was converted by the brokers to their own use, the customer was damaged, and the measure of his damages was the highest price of the stock between the date of the conversion and that of the trial of a suit brought by the customer for the unlawful conversion: Learock v. Paxson, supra. Prom this there would, of course, have to be deducted the balance of the purchase money due the brokers. “The pledgee of stock cannot legally part with the possession of the stock by a sale or repledge of it, except as he transfers the debt which the stock secures. If he does so he is guilty of a conversion. ......Even where, apparently, the pledgor would not be injured by the pledgee’s separating the stock from the debt and transferring the stock pledged as collateral- security, yet the law rigidly protects the interests of the debtor and pledgor, and will not compel him to submit to the danger of such transfers by the pledgee. There may, of course, be an express contract or understanding to the contrary”: Cook on Corporations (6th Ed.), Sec. 471.

The contract of Sproul - & Company, which the appellants, through their receiver, would enforce against Sloan, was one to hold the stock for him until he paid *289the balance of the purchase money and demanded delivery of the securities, and in the interval they had no right to repledge the stock except for the debt which it secured. Instead of performing their contract with Sloan, the brokers made use of his property as if it was a part of their own capital, to enable them to make enormous loans, not, however, for the purpose of carrying his stock, but that they might continue to carry on their business as stock brokers. They treated his stock as their own, and the moment they did so without his authority, they placed him in jeopardy. After thus having broken their contract with him, why should they be permitted to demand performance by him? He was in entire ignorance, until a short time before the tidal, that his brokers had converted his stock to their own use, and as soon as he learned what they had done, he promptly repudiated his contract with them. This was his undoubted right. The tender of the stock to him before it was sold is immaterial, for, at the time of the tender, the contract had been broken by the brokers, and, therefore, neither they nor their receiver could thereafter call for performance by their customer. It was for this reason that the learned trial judge directed the verdict for the defendant, and no sufficient answer has been given to it on this appeal. Nothing is to be found in any of our cases in conflict with the view of the court below. The main reliance of counsel for appellant seems to be placed on Wynkoop v. Seal, 64 Pa. 361. In that case the broker bought stock for a customer under a special contract, by the terms of which the customer was to have thirty days’ credit in paying, for it, and the title to it did not pass at the time of the purchase from the seller. In addition to this, the writer finds from an examination of the paper books in the case that it did not appear that the broker had hypothecated the stock for any other indebtedness than that of his own customer.

The unauthorized pledging by a broker of his cus*290tomer’s securities places the latter in jeopardy, and the only safe and sound rule, in the absence of authority from the customer to pledge them as they were pledged in the case now before us, is that the broker pledges them at the peril of forfeiture of his right to call upon his customer for performance. It was contended in the court below that what -Sprout--&f 'Company did was a common usage among brokers, whose business would be seriously interfered with if they were forbidden to repledge securities of their customers. As to this the learned trial judge well said: “Such a usage can never be shown, if it be in contravention of a well-established rule of law. It is a rule of law in Pennsylvania that the relation between a broker and his customer with respect to stocks purchased upon margin is that of pledgor and pledgee. To permit the broker to use the stock as capital in his own business is to shift the risk of his business upon his customers, a thing never contemplated in the contract. Such a usage, if it exists, is unreasonable: ‘Malus usus abolendus est.’ ”

The assignments of error are overruled and the judgment is affirmed.